Was just looking back at some of my first activities recorded on Strava (rides) and noticed that the gear selected for the ride was my current default bike for "ride" sport types (Cervelo R5). The problem here is that the bike I have set as my default for rides was purchased several years after these first rides. For those initial rides, I'm guessing I didn't have any gear set, so I then looked at the rides I had logged just before my actual first ride with my current bike, and see that they too are marked as R5 rides, even though I know by that time I would have marked them as my old bike (Allez).

When I recently set my default bike for rides (R5) did that action override what gear I selected (or didn't select) for those old rides, and artificially inflate the miles logged on my R5?